Screw plug mounting for an electric immersion heater



FIG. 1 is a perspective view of a screw plug mounting for an electric immersion heater, showing our new design;

FIG. 2 is a top plan view of said mounting, and

FIG. 3 is a sectional view corresponding to the line 3--3 of FIG. 2. 

The ornamental design for a screw plug mounting for an electric immersion heater, substantially as shown. 